Dental impression-tray.



' E. E. WIGHTMAN.

DENTAL IMPRESSION TRAY. APPLICATION FILED mm. 1, 1912.

1,044,61 4, Patented Nov. 19, 1912.

Inventor: EZAEREfifWiT W yl adfl/ d4ww Attorneys other metals, and also in soft 7 sheet of drawings, forms a exact specificatiomwhich will enable others skilled in the art to which said invention appertains of the finish i adapte UNITED sTATns PATENT OFFICE,

7 V mm B. manner, or omcaeo, innmors.

nseam.

To all whom it may Be it known that l, ELMER E. WIGHTMAN, a citizen of the United States, and resident of Chicago, in the county of of Illinois, have invented certain new and useful Improvements in Dental Impressions Trays; and I do hereby declare that the following description of my said invention, taken in connection withthe accompanyin full, clear, an

to make and use the same. This inventionhas general reference to improvements in dentists impression trays; and it consists, essentially, in the novel and peculiar' combination and arrangement of parts and details of construction, as here inafter first fully set forth and described, and then pointed out in the claim.

e object of this invention is the production of a highly efiicient, serviceable, sanitary, and comparatively inexpensive dentists impression tray that can be manufactured and sold at a reasonable'price.

in the drawings already mentioned, which serve to illustrate this invention more fully, Figure 1 is a plan of my improved impression tray. Fig. 2 is a side view of the same. Fig. 3 is a sectional view on line 23% of Fig. 1. Fig. 4- is an end view of the impression tray.

Like parts are designated by the same characters and symbols of reference in all the figures. 'llhls' impression tray, which, is of the usual horseshoe contour, 18 made in several sizes to fit the human jaws. As heretofore constructed, this tray has been largely produced in the process of casting in soft and rubber, which, owever isobjectionable owing to the weight ed article in the metallic trays, and the extreme flexibility of the rubber trays, and the high cost of production of either kind of these trays. To overcome these serious objections, and others which it is deemed unnecessary struct this impression tray of sheet metal, preferably aluminum, wh ch, owin to its ductilit and lightness is especial y well for the dental impression tra comprises the .usual horseshoe-shaped bow Specification of at." Patent. Application filed larch. 1, 1812. Serial No. 680,781. 7

Cook and State tending portion of the handle said wall to recite, I con-' the desire purpose stated. This or cup 12-, haVing the upwardly curved portion 14;, to fit the roof 0 the mouth of a patient whose mouth or rather ms and teeth-impression is to be taken. Tfii s bowl has an outwardly-flaring outer wall 15, which, in order to prevent its narrow marginal edge from injuring a persons'mouth or gums or 'to cause unnecessary pain, has its said marginal edge outwardly and downwardly extended at 16, to form a roll or bead thereon, as illustrated in Fig. 4.

From the lip-portion 17 pro'ects forwardly a handle 18, which handle is inteformed with said bowl, and which e is an integral continuation of the all ofthe-bowl, said handle extending handl side w .fIOlH' the upper margin of the lip-portion and thenby 17 by a curve 19, downwardly, a further curve .20, horizontally, approxi-. mately medially of the'base and the upper margin of the wall 17, thereby leavmg an open space 21, between the inclined-wall and t e downwardly turned portion of the handle 18, as will hereinafter appear.

This dental impression tray is formed from a single piece of sheet metal having, in the flat, approximately the same outline as the finished article, except that. the blank is slightly larger to afford the required metal that forms the wall of the tray; and this blank is stamped in suitable dies to the shape desired. It is then highly polished by'suitable bufling and coloring wheels; and in order to reach the entire lip-portion of the tray and the downwardly extending portion of the handle,'said downwardly exis spaced from ace 21, which to o erate on of t e downthe wall 17 to afiord the s space permits a bufling whee and the inner surface wardly extending portion of said The object o: f depressing the handle below the upper margin of the wall of the tray is to permit a patient to close her or his mouth u on the tray while an impression is being ta en, the'upper or lower lip of the patient, as the case may be, closing over the downwardly extending portion offthe handle. 7

A dental impression tray constructed from a sin 1e piece of le quality of ham very 1i ht, bendablegso that it can be rea 1y sha l) to fit a persqns'guxns, and thatit 1s absp utely sanitary, the being no corners, crevices, or

Patented Nov. 19,1912.

handle.

seams which can harbor germs or other 1 wardly, approximately parallel to the base health-injuring matter. of the tray. 7

Having thus fully descr'bed this inven- In testimony that I claim the foregoing as tion, I claim as new and desire to secure by mv invention, 1' have hereunto set my hand 5 Letters Patent of the United Statesin the presence of two subscribing witnesses.

A dental irn ression tra formed from a singlepiece 0 sheet meta tegrally with ELMER its andle, said handle exten from the Witnesses: upper margin of the li of sai tray for- Mlcmnn J. STARK, [0 wardly and downwa y and again for- Amnm A. 000m. 

